diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2014-09-03 10:35:13 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-09-04 13:50:11 -0400 |
| commit | 87fed556d08d21dd7dd3e0222c94c187e4c2d5e2 (patch) | |
| tree | a5c774f9d7c8ee110eb322d12c7233da3867988c | |
| parent | d17ec4d55223d9487df195012762da6f85862d4c (diff) | |
bcma: get info about flash type SoC booted from
There is an ongoing work on cleaning MIPS's nvram support so it could be
re-used on other platforms (bcm53xx to say precisely).
This will require a bit of extra logic in bcma this patch implements.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/bcma/driver_mips.c | 62 | ||||
| -rw-r--r-- | include/linux/bcma/bcma_regs.h | 5 |
2 files changed, 67 insertions, 0 deletions
diff --git a/drivers/bcma/driver_mips.c b/drivers/bcma/driver_mips.c index 11115bbe115..004d6aa671c 100644 --- a/drivers/bcma/driver_mips.c +++ b/drivers/bcma/driver_mips.c @@ -21,6 +21,14 @@ #include <linux/serial_reg.h> #include <linux/time.h> +enum bcma_boot_dev { + BCMA_BOOT_DEV_UNK = 0, + BCMA_BOOT_DEV_ROM, + BCMA_BOOT_DEV_PARALLEL, + BCMA_BOOT_DEV_SERIAL, + BCMA_BOOT_DEV_NAND, +}; + static const char * const part_probes[] = { "bcm47xxpart", NULL }; static struct physmap_flash_data bcma_pflash_data = { @@ -229,11 +237,51 @@ u32 bcma_cpu_clock(struct bcma_drv_mips *mcore) } EXPORT_SYMBOL(bcma_cpu_clock); +static enum bcma_boot_dev bcma_boot_dev(struct bcma_bus *bus) +{ + struct bcma_drv_cc *cc = &bus->drv_cc; + u8 cc_rev = cc->core->id.rev; + + if (cc_rev == 42) { + struct bcma_device *core; + + core = bcma_find_core(bus, BCMA_CORE_NS_ROM); + if (core) { + switch (bcma_aread32(core, BCMA_IOST) & + BCMA_NS_ROM_IOST_BOOT_DEV_MASK) { + case BCMA_NS_ROM_IOST_BOOT_DEV_NOR: + return BCMA_BOOT_DEV_SERIAL; + case BCMA_NS_ROM_IOST_BOOT_DEV_NAND: + return BCMA_BOOT_DEV_NAND; + case BCMA_NS_ROM_IOST_BOOT_DEV_ROM: + default: + return BCMA_BOOT_DEV_ROM; + } + } + } else { + if (cc_rev == 38) { + if (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT) + return BCMA_BOOT_DEV_NAND; + else if (cc->status & BIT(5)) + return BCMA_BOOT_DEV_ROM; + } + + if ((cc->capabilities & BCMA_CC_CAP_FLASHT) == + BCMA_CC_FLASHT_PARA) + return BCMA_BOOT_DEV_PARALLEL; + else + return BCMA_BOOT_DEV_SERIAL; + } + + return BCMA_BOOT_DEV_SERIAL; +} + static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore) { struct bcma_bus *bus = mcore->core->bus; struct bcma_drv_cc *cc = &bus->drv_cc; struct bcma_pflash *pflash = &cc->pflash; + enum bcma_boot_dev boot_dev; switch (cc->capabilities & BCMA_CC_CAP_FLASHT) { case BCMA_CC_FLASHT_STSER: @@ -269,6 +317,20 @@ static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore) bcma_nflash_init(cc); } } + + /* Determine flash type this SoC boots from */ + boot_dev = bcma_boot_dev(bus); + switch (boot_dev) { + case BCMA_BOOT_DEV_PARALLEL: + case BCMA_BOOT_DEV_SERIAL: + /* TODO: Init NVRAM using BCMA_SOC_FLASH2 window */ + break; + case BCMA_BOOT_DEV_NAND: + /* TODO: Init NVRAM using BCMA_SOC_FLASH1 window */ + break; + default: + break; + } } void bcma_core_mips_early_init(struct bcma_drv_mips *mcore) diff --git a/include/linux/bcma/bcma_regs.h b/include/linux/bcma/bcma_regs.h index 917dcd7965e..e64ae7bf80a 100644 --- a/include/linux/bcma/bcma_regs.h +++ b/include/linux/bcma/bcma_regs.h @@ -39,6 +39,11 @@ #define BCMA_RESET_CTL_RESET 0x0001 #define BCMA_RESET_ST 0x0804 +#define BCMA_NS_ROM_IOST_BOOT_DEV_MASK 0x0003 +#define BCMA_NS_ROM_IOST_BOOT_DEV_NOR 0x0000 +#define BCMA_NS_ROM_IOST_BOOT_DEV_NAND 0x0001 +#define BCMA_NS_ROM_IOST_BOOT_DEV_ROM 0x0002 + /* BCMA PCI config space registers. */ #define BCMA_PCI_PMCSR 0x44 #define BCMA_PCI_PE 0x100 |